Estimate MCC XYZ values and white point from image processor data
[macbethXYZ, whiteXYZ] = vcimageMCCXYZ(vci,pointLoc,method)
The white patch is treated as the image white point.
We either assume the display is an sRGB display (method = 'sRGB'), or we
use the model display in the processor window (method = 'custom').
Examples:
vci = vcGetObject('vcimage'); [macbethXYZ, whiteXYZ] = vcimageMCCXYZ(vci);
figure(1); clf; plot3(macbethXYZ(:,1),macbethXYZ(:,2),macbethXYZ(:,3),'o')
xy = chromaticity(macbethXYZ);
clf; plot(xy(:,1),xy(:,2),'o'); hold on; plotSpectrumLocus;
grid on; axis equal
macbethLAB = vcXYZ2lab(macbethXYZ,whiteXYZ, 1);
clf; plot3(macbethLAB(:,1),macbethLAB(:,2), macbethLAB(:,3),'o');
set(gca,'xlim',[0 105]); grid on
Copyright ImagEval Consultants, LLC, 2005.